http://msdn2.microsoft.com/en-us/library/ms566925.aspx

http://technet2.microsoft.com/Office/en-us/library/841080ca-3e3b-4dbc-a081-43c29c76b3551033.mspx?mfr=true

http://blogs.msdn.com/harsh/archive/2007/03/21/single-signon-error-codes-and-what-they-mean.aspx

http://blogs.msdn.com/harsh/archive/2007/01/10/forms-based-authentication-in-moss.aspx

http://msdn2.microsoft.com/en-us/library/ms577961.aspx